Chemical and mineral compositions of hydrothermal sulfide deposits from the Lucky Strike hydrothermal field, Mid-Atlantic Ridge

Several hydrothermal sulfide structures were sampled using the Mir manned submersibles in the relatively shallow Lucky Strike vent field, Mid-Atlantic Ridge. Bathymetric position of these structures varies by approximately 100 m. Investigation of chemical and mineral compositions of hydrothermal ore occurrences led to the conclusion that the initial high-temperature ore-bearing solution ascending toward the surface became unstable and experienced phase separation beneath the ocean floor. The phase separation was responsible for bathymetric control of hydrothermal ore formation within the field.

Observation of manganese deposits in the Blake Plateau, Florida and Caribbean sea areas

Designed by the Westinghouse Corporation in collaboration with Jacques Cousteau, DEEPSTAR-4000 is a deep diving research vehicle based on Captain Cousteau's DIVING SAUCER. An evaluation of DEEPSTAR's operational performance at sea is presented in this report through a description of typical dive procedures and the actual NAVOCEANO dive results.

Annotated record of the detailed examination of Mn deposits from NASKA cruise stations

The cores and dredges described at this site were taken on the NASKA cruise from 21 February until 26 March 1986 by the Muséum National d'Histoire Naturelle from the R/V Marion Dufresne. A total of 25 cores and dredges were recovered and are available at MNHN for sampling and study.

Annotated record of the detailed examination of Mn deposits from DOWNWIND Expedition stations

The cores described in this report were taken on the DOWNWIND Expedition in October 1957 to February 1958 by the Scripps Institution of Oceanography from the R/V Spencer F. Baird and the R/V Horizon. A total of 201 cores and dredges were recovered and are available at Scripps for sampling and study.

Annotated record of the detailed examination of Mn deposits from the Albatross 1884 stations

he exploration of the Gulf Stream region was continued in 1884, under nearly the same conditions as in 1883, by the steamer Albatross, Lieut. Z. L. Tanner, commander. During the four trips, between July 20 and Sept. 13, sixty nine dredgings (at stations 2170 to 2238) were made. The results were highly satisfactory, both in the way of physical observatidns and zoological discoveries. In some localities, in 1000 to 1600 fathoms, the bottom was found covered with 0or largely composed of hard, very irregular, flattened, crust-like concretions of clay and iron-oxide, with more or less manganese?oxide in the crevices and worm-burrows with which they are filled. Sometimes a barrel-full, or more, of such masses were brought up, varying in size from a few ounces up to 20 pounds or more in weight alld from one inch to six inches in thickness.